Stove



Dec. 31, 1940. Q EHRET 2,226,925

STOVE Filed May 17, 1959 3 Sheets-Sheet l INVENTOR. Clement Ehret ATTORNEY.

Dec. 31, 1940. c. EHRET 2,226,925

STOVE Filed May 17, 1939 3 Sheets-Sheet 2 INVENTOR Clernerfl: Ehrei:

ATTORNEY.

Dec. 31, 1940. c. EHRET 2,225,925

STOVE Filed May 17, 1959 3 Sheets-Sheet 3 W ilf INVENTOR. Clement Ehret BY I I ATTORNEY.

Patented Dec. 31, 1940 UNITED STATES PATENT OFFICE 2 Claims.

A This invention relates-to stoves and is directed more particularly to a structure wherein a stove body comprising one or more ovens and surface cooking devices is mounted for rotation in vertical adjustment on and with respect to a relatively stationary base adapted to rest on the floor.

In patentswhich haveheretofore issued to me; stoves of this general character have been del scribed and claimed, but, in; such prior instances, the stove body is adapted to be raised and lowered with respect to its base by mechanical connections between these partsk'According to the present invention, in contradistinction, the changing of elevation of the stove body is adapted to be effected hydraulically, so that with heavy stoves such vertical adjustment may be obtained without the expenditure of appreciable force on the part of the user. a Thepresent invention thus comprises a base which a piston is mounted for reciprocation and on this piston the stove bodyis mountedfor rotation. I This stove body may rotate with the piston or may rotate with respect thereto,but in any event meansis preferably provided to lockthe stovebody against rotation "when so desired; "'TWithinthe baseis a reservoir for a foot power inedium suchas oil, and a valved passage leads I from the reservoir to the cylinder. A pump cooperates with this passage in such manner as to feedliquid under pressure from the reservoir to the cylinder forthe purpose of liftingthe pis ton and a bleeder valve is provided to permit the escape of liquid from the piston when it is desired to lower the stove body. The pump may be power operated or manually operated, and when manually operated may be actuated by either hand or foot power as will be hereinafter more fully explained. g 1 a Features of the invention, other than'those adverted to, will-beapparent from the hereinafter detailed description and claims, when read in conjunction... with the accompanying drawings. The accompanying drawings illustrate different practical embodiments of the invention; but the constructions therein shown are to be understood as illustrative, only, and not as defining the limits ofthe invention; f a J Figure l'is a side elevation of a stove embodying'the present invention with foot control.

Figure 2 is a like view, but showing a hand control." Figure- 3' shows the same stove as illustrated in Figure '1', but with the'base and piston portions of provided therein with an upright cylinder in the stove in section in the plane of the line 3'3 of Figure 1.

Figure 4 is a section on the line 44 of Figure 3. r V

Figure 5 is a radial vertical fragmental section on the line 55 of Figure 3.

Figure 6 is a side elevation partly in central section showing a modified form of theinvention wherein the baseis mounted for rotation on a circular trackas' hereinafter described.

In the accompanying drawings, l-designates a stove body provided therein with one or more ovens having oven doors generally designated as 2 and the top of the stove has usual surface burners or heating elements in any desired number and individually controlled by the handles 3. The heating element or elements within the oven may be conventional.

The stove body I is supported on a base] mounted within an ornamental shell 5 to which the base may be secured in any desired manner or may be left free from attachment as the purpose of this shell 5 is preferably to cover and conceal the base and its working parts within a M sightly casing. 25

The base 4 may be in the form of one or more castings suitably machined and constituted to serve as a support for the stove body and to properly house the operating mechanism which will presently be described. As shown the base is provided therein with an upright cylinder 6 communicating through a passage 1 with a reservoir 8 in which may be maintained a supply of fluid. The passage 1 has an inlet 9 which communicates with the reservoir 8 and is controlled by a check 5 valve I 0 opening into the passage. The other end of the passage leads to the cylinder 6 and has a check valve l I opening into the cylinder. A pump barrel [2 carries therein a plunger [3 which, when raised, opens the valve ID to draw fluid from the reservoir 8 into the pump barrel cylinder I2 and which, when lowered, closes the check valve l0 and forces such fluid through the passage 1 and by the cheokvalve ll into the cylinder 6.

w The pump plunger l3 extends to the exterior of the casting and is bifurcated at its upper end for the passage of a lever [4 to which it is secured by a pivot pin IS. The after end of the lever I4 is pivoted to a boss IS on the casting and said lever extends forwardly through a slot ll in the shell to the exterior thereof and is there provided with a treadle l8, by means of which the pump plunger l3 may be operated to force fluid from the reservoir into the cylinder 6. In-

stead of utilizing a treadle to actuate the pump plunger, I may extend the fulcrum pivot of the lever l4 through the shell to the exterior thereof and attach thereto a handle l9, as shown in Fig- 5 ure 2, for operating said lever, in which case the lever M may be cut off just forwardly of the plunger I3 and need not extend through the shell 5.

Operating within the cylinder 6 is a piston 20 which has a close sliding fit with the wall of the cylinder and may, if desired, be provided with compression rings. This piston 2i) extends upwardly and has an enlarged portion 2! which passes through an axial opening 22 in the top of the shell 5 and this enlarged portion supports.

the stove body I. As shown, the enlargedpore tion 2! has a socket 23 in its topan'd into this socket extends a trunnion 24 attached centrally to the bottom of the stove body. This trunnion is cylindrical so as to provide for rotation of the stove body. On top of the portion 21 is mounted an anti-friction element 25 and a similar-antifriction element 26 is mounted on the stove body and ball bearings 21 are interposed in races be- 25 tween these elements, so as to eliminate undue friction. The stovebody may thus be rotated with ease, but is adapted to be locked in any desired position by means of a set screw 28.

The stove of the present invention may utilize 30 any desired type of heating medium. The same maybe gaseous, fluid or electricand this invention is thus not limited to any particular type of heating medium. However, for the purpose of present illustration, the structure is shown in Figure 3, as appropriate foruse with gas or oil. Such a heating medium requires conduits to feed the same to the heating elements in the stove 7 body and these conduits must be so'constituted that the feed of such medium will be uninterrupted by rotation of the stove body. The ar- 'ra'n'ge'ment shown will permit of this.

By referenceto Figure 3, the pipe ZQTeeds fuel to 'a horizontal passage 35- in the ,baseiand this passage communicates with a vertical passage 3! in which a pipe 32 is fitted for c'losesliding movement and may be provided with aipacki'ngfSE to preclude leakage. The upper end of this pipe is connected by means of a thread 34'toja horizontal passage 35which leads. to a vertical passage '36, the latter of which is 'coa dal with the stove and has a smooth bore, Extending downwardly into this passage from the stove body is a fuel feed pipe 37 for the stove body. It fits closely into the passagetd and may be provided with packing rings -38to preclude leakage while permitti-ng it to readily rotate within the passage 36. "By virtue of the sliding movement between the pipe 32 and the passage 3!, the piston 28 is free for vertical movement within the cylinder-5.

0 The'pistoh may be elevated by operating the pump plunger in the manner hereinbefore described. It may be lowered by operating the plunger. valve shown in Figure 5 or by any other appropriate mechanism for. th s po e- As illustrated in Figure 5, a valve 39 is positioned below the bottom end of the piston 2t when the latter is in its lowermost position. Said valve 39 has a stem 40 which extends through a tapped hole 4! in the casing. A spring 42 acts 7() against a fixed collar '43 to normally seat the valve 39. A pedal '44 pivoted at 45 overlies the outer end of the valve stem '46 and extends through a slot in the shell 5 into accessible position'to be operated by the foot, as shown in Fig- .75 ures 4 and 5. When it is desired to lower the stove body, the pedal 44 may be depressed to unseat the valve 39 and allow the discharge of fluid from the pump cylinder 6 into the reservoir 8. The valve 39 is preferably made small, so that this flow is slow and brings about a gradual 5 lowering of the stove body without shock or jar.

It may be desirable under certain conditions to mount the base of the stove in such manner that it may be bodily rotated. Figure 6 shows a construction wherein this is made possible. As 10 there illustrated the base4 is provided with a plurality of depending brackets '46, each of which carries a roller or other appropriate anti-friction device 41 and these rollers are adapted to ride upon an annular track 48 supported on the floor 15 or other firm support. The shell 5 is made somewhat deeper than in Figure 3, so as to extend "downwardly'into proximity with thefiocr in order to conceal the brackets, rollers and track.

When the base is mounted for rotation the 20 structure must be so constituted as to permit of the heating -medium -in'an uninterrupted :manner. This is provided for in Figure 6 -by';elim inating'the pipe 29 and passage 3il- -an d substitute ing therefor apassage-49 which extends iromthe 25 lower end .of the passage -3I-to substantially the vertical axis of the base where it communicates with a chambered boss 50. Into this boss is threaded a short length of tubing 5| which projects into a litting v52 provided with a. packing 30 gland 53. This gland maintainsa leak-proof joint while permitting the pipe 5| to rotate therein. The fitting .52 is hollow and is connected to a main Tfuel feed pipe '54 which may project downwardly through the floor or later- 35 ally through an open'ing-in'thetrack and beneath the shell '5 as shown. With this arrangement the heating medium is fed coaxial of the base through the .pipe 5| which maintains itsrelation with the fitting While the base may freely 4Q rotate. V 7 a The structure shown inFigure'G may include the trunnion 2'4' and locking screw'28, if' desired, or the piston-.may-be attached rigidly to the stove body]. It willbe. u derstood, that aside from the difie'rences' to which I have specifically referred in Figure 6, the construction of this figure .comprises the other operating parts which have .been described in connection with Figures 1-'5.

The arrangements'which I have described are D simple and compact and provide convenient means foffcontrol and operation for astoveof this character. The pump barrelfl is of small diameterfas compared 'to that "of the cylinder '6 and consequently the pump plungermay be operated P with the expenditure of little force tofraisea relatively heavystovebody and-the body'is raised withoutj'sh'ock or jar and in a smooth and'even manner. 'It is'lowe'red ina like way. W hen any position of vertical adjustment which may Q be convenient to the operator the 'fueliorfotlier heating medium is fed 'coaxially "inlia manner to permit of rotation of the stove body without in anyw-ise interfering with the feed rof'such li'eati-ng medium. 'If'oil is .used'it'm'ay be efi'icie'ntly fed through the connectionsshom in Figures 3 and 6. If electricity'isemployed, lthefeed wires may be led to the construction of Figure 53 through the opening in the shell 5 thl'OllghWhi'ChthEDiPE 29 passes and may. then pass upwardlyrithrough a 0 loop directly into thexpassa'ge -3 5 to a commutator in the passage 36 to cooperate with'ithe-"commutator brushes carried by the lower end oithe trunnion 23 and which brushes are connected; to

the heating elements in-multiple.;; For the deed of electricity to the construction of Figure 6, the wires may lead to a commutatorembodying concentric rings and positioned in the location of the fitting 52 and associated contacts may be carried by the base to bear against these rings at all times with the wires leading from said contact through the passage 49 and thence through the passage 3|, as described in connection with Figure 3.

Having thus fully described the invention, what I claim as new and desire to secure by Letters Patent is:

1. A stove body support comprising a base having therein an upright cylinder, a stove body supporting piston operable in said cylinder, a pump for forcing fluid into the cylinder below the piston to elevate the same, means for bleeding the cylinder to lower the piston, said piston having an axial passage in its upper end portion and the base having a non-axial upright passage laterally of the cylinder, an extensible conduit connection between said passages to feed a heating medium through the passage in the base to the passage in the piston.

2. A stove body support comprising a base having therein an upright cylinder, a stove body supporting piston operable in said cylinder, 9. pump for forcing fluid into the cylinder below the piston to elevate the same, means for bleeding the cylinder to lower the piston, said piston having an axial passage in its upper end portion and the base having a non-axial upright passage laterally of the cylinder, an extensible conduit connection between said passages to feed a heating medium through the passage in the base to the passage in the piston, and anti-friction means on the upper end of the piston to support the stove body thereon for rotation with respect to the piston.

CLEMENT EI-IRET. 

